试井在低渗透油藏压裂效果综合评价中的应用

Based on well test to evaluate the fracturing effect in low permeability reservoir

低渗透油藏自然产能差,通常需要经过压裂改造,试井对评价低渗透油藏压裂改造效果具有重要作用,业界已发表过有关理论方法及分析例子,但缺少典型区块的综合分析成果,本文通过综合分析,提出了利用试井评价压裂效果的方法。通过对油井压裂前的试井解释数据和压裂后的试井解释数据对比分析,就可以得到油井压裂后的裂缝半长、渗透率增加值和导流率等参数。将该方法应用于HJ油田取得了较好的效果,表明该方法可以在低渗透油藏压裂效果评价推广应用。

The natural productivity of low permeability reservoir is poor, which need fracturing. In order to evaluate the efficacy of fracturing for low permeability oil reservoirs, the well test is used for evaluate the fracturing effect. Based on the well test interpretation data before and after fracturing, the fracture half-length, the added value of permeability and the diversion rate parameter can be got. The application of this method to HJ oilfield, which shows that this method play a good role in evaluating the fracturing effect for low permeability reservoir. This method can be applied to other low permeability reservoir.